mirror of
https://gitlab.com/qemu-project/qemu
synced 2024-11-05 20:35:44 +00:00
4daa187d49
Add a script that enhances gdb to be aware of QEMU data structures. This patch adds a single gdb command, 'qemu mtree'. The command is similar to the monitor's 'info mtree', except that it prints MemoryRegion addresses, and except for working from a core dump as well as a live instance. Signed-off-by: Avi Kivity <avi@redhat.com> Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
89 lines
2.7 KiB
Python
89 lines
2.7 KiB
Python
#!/usr/bin/python
|
|
|
|
# GDB debugging support
|
|
#
|
|
# Copyright 2012 Red Hat, Inc. and/or its affiliates
|
|
#
|
|
# Authors:
|
|
# Avi Kivity <avi@redhat.com>
|
|
#
|
|
# This work is licensed under the terms of the GNU GPL, version 2. See
|
|
# the COPYING file in the top-level directory.
|
|
#
|
|
# Contributions after 2012-01-13 are licensed under the terms of the
|
|
# GNU GPL, version 2 or (at your option) any later version.
|
|
|
|
|
|
import gdb
|
|
|
|
def isnull(ptr):
|
|
return ptr == gdb.Value(0).cast(ptr.type)
|
|
|
|
def int128(p):
|
|
return long(p['lo']) + (long(p['hi']) << 64)
|
|
|
|
class QemuCommand(gdb.Command):
|
|
'''Prefix for QEMU debug support commands'''
|
|
def __init__(self):
|
|
gdb.Command.__init__(self, 'qemu', gdb.COMMAND_DATA,
|
|
gdb.COMPLETE_NONE, True)
|
|
|
|
class MtreeCommand(gdb.Command):
|
|
'''Display the memory tree hierarchy'''
|
|
def __init__(self):
|
|
gdb.Command.__init__(self, 'qemu mtree', gdb.COMMAND_DATA,
|
|
gdb.COMPLETE_NONE)
|
|
self.queue = []
|
|
def invoke(self, arg, from_tty):
|
|
self.seen = set()
|
|
self.queue_root('address_space_memory')
|
|
self.queue_root('address_space_io')
|
|
self.process_queue()
|
|
def queue_root(self, varname):
|
|
ptr = gdb.parse_and_eval(varname)['root']
|
|
self.queue.append(ptr)
|
|
def process_queue(self):
|
|
while self.queue:
|
|
ptr = self.queue.pop(0)
|
|
if long(ptr) in self.seen:
|
|
continue
|
|
self.print_item(ptr)
|
|
def print_item(self, ptr, offset = gdb.Value(0), level = 0):
|
|
self.seen.add(long(ptr))
|
|
addr = ptr['addr']
|
|
addr += offset
|
|
size = int128(ptr['size'])
|
|
alias = ptr['alias']
|
|
klass = ''
|
|
if not isnull(alias):
|
|
klass = ' (alias)'
|
|
elif not isnull(ptr['ops']):
|
|
klass = ' (I/O)'
|
|
elif bool(ptr['ram']):
|
|
klass = ' (RAM)'
|
|
gdb.write('%s%016x-%016x %s%s (@ %s)\n'
|
|
% (' ' * level,
|
|
long(addr),
|
|
long(addr + (size - 1)),
|
|
ptr['name'].string(),
|
|
klass,
|
|
ptr,
|
|
),
|
|
gdb.STDOUT)
|
|
if not isnull(alias):
|
|
gdb.write('%s alias: %s@%016x (@ %s)\n' %
|
|
(' ' * level,
|
|
alias['name'].string(),
|
|
ptr['alias_offset'],
|
|
alias,
|
|
),
|
|
gdb.STDOUT)
|
|
self.queue.append(alias)
|
|
subregion = ptr['subregions']['tqh_first']
|
|
level += 1
|
|
while not isnull(subregion):
|
|
self.print_item(subregion, addr, level)
|
|
subregion = subregion['subregions_link']['tqe_next']
|
|
|
|
QemuCommand()
|
|
MtreeCommand()
|